[Bug 1886048] [NEW] Monthly cron generates error if wtmp hasn't been rotated

[Rowan Wookey]

Public bug reported:

The logrotate config for wtmp on focal looks like this:

# no packages own wtmp -- we'll rotate it here
/var/log/wtmp {
    missingok
    monthly
    create 0664 root utmp
    minsize 1M
    rotate 1
}

It only rotates if wtmp is larger than 1M. In the case of a fresh
install that has a wtmp smaller than 1M it won't rotate and
/var/log/wtmp.1 won't exist, in this case we should use /var/log/wtmp

I've attached a patch.

** Affects: acct (Ubuntu)
     Importance: Undecided
         Status: New

** Attachment added: "acct.patch"
   https://bugs.launchpad.net/bugs/1886048/+attachment/5388982/+files/acct.patch

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https://bugs.launchpad.net/bugs/1886048

Title:
  Monthly cron generates error if wtmp hasn't been rotated

Status in acct package in Ubuntu:
  New

Bug description:
  The logrotate config for wtmp on focal looks like this:

  # no packages own wtmp -- we'll rotate it here
  /var/log/wtmp {
      missingok
      monthly
      create 0664 root utmp
      minsize 1M
      rotate 1
  }

  It only rotates if wtmp is larger than 1M. In the case of a fresh
  install that has a wtmp smaller than 1M it won't rotate and
  /var/log/wtmp.1 won't exist, in this case we should use /var/log/wtmp

  I've attached a patch.

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